Make base towers replaceable again.

[Ger-Dyers-Eve]

in my opinion the early game is the best of btanks..
to fight for every little amount of gold to get better is the interesting thing for me.
in lategame its possible to kill creeps fast and they are not longer too strong to rush through.
thats why i never play games with 5 or 10k startgold because its too lame for me^^

First this!

And in addition: The eraly game is much more interesting because of the behaviour of all those players. Every player follows his own strategy and weapon/tank-build. In early game also makes the whole game interesting because there will be 2-3 players, who kills a lot of tanks - but that becomes unintersting in mid/late-game because the teams will concentrate on those fed people. If you jump in 5-10k gold, all those factors disappear - or moved to late game.